Everyone is different, and there are different chemo regimes, but here’s my experience. I had my hair cut short before chemo, and when it started coming out in handfuls I had a friend, a former hairdresser, shave me. Perhaps I was lucky it was full-on Covid time, and winter, but I didn’t go out much, and when I did I wore a turban. Despite my worst fear, I had no nausea at all, and the other side effects were manageable. Maintain maximum hygiene, and look after your teeth and gums. My biggest mistake was not to exercise to my maximum ability: I came out of chemo almost immobile. Then again, I was 75, and physio fixed me reasonably quickly.
Good luck with it, and remember management of chemo is improving all the time, and some almost sail through it.